1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2700e38940c0ffd645044f74c24619c22a182f284372a9d1472e07f2d0ebf71f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fe231cd-2c57-495c-9564-e138320c8496.json and https://artists.proofprofile.net/proofs/artist/8fe231cd-2c57-495c-9564-e138320c8496.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f499b4d03f95ad0b5155d64981702e6f222d9474ab432c715741e22f786888. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF1575156.
Un Arpa Descansa Dentro De Un Piano De Cola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cd8f6cad16251fc4193ccc9c64901176fa386af1e0fb8a12934e6989ad9cc9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81923120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d35ba0455a900b466c674297c7475d482c55c7aed3e487db4a3480643f1798. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21804632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee43924a548ef78a527e90deb94e3c3c93154e63027e508af605e5cdaf1b8244. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72008795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d4d6fa977734d43c7c89c6435f914e0ef3038f439bfe834d8fac569a6663e7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72101701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f8d14a40ce5db9493a6d494e47bbb43aec3e85e93b69e76919a517570cdaeb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580f2c8fe72ae23027e19ee318e126fd19015b72a8bd4623cd270eaa063fb551. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70087f7d7edc3fce58df1c37343962e808c61a16396730008ff5aec4cfbf6157. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988df0cca4a5a3e49b6e0a09dccb4ad5a8d20f8371a9fe5b3cdef72ec3200c59. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b88dd1bbaf0ef274b696fd3c290d95b0e197997f1971b11dbbfbc1a2a934ee6. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae9db208e5f4719884e20d75486a37a686c0014465a074195021cb1b86865ce. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693775d819954cc72f37472cd34479406b8b9dd37b8aa3dbf8c354dc27e7f38e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c53a84c7e22ba0c15f50663ad3786141dbf6d552b9486ba4cef061886ec2e5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72400428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31f2d510ecba74661e02d196ea176fb6fc4c7676c8be832d717a2f0792e51a1. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72400669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f006e0bd49145f6cc1fbb7ccf7a0e34270ab1fc3eee18a57dc5ecd57febd472. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72401081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ec5ec07368f6a66cb6594a794d9a792f38656b67115a8c1103bdbff693ab14. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72401501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf232a0b888181b4ed8756323611509fdb9199a4d6697ce8f52c699e6ae963b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72401931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b440c008db70509f41c9dd6956cdba797172efd9f544230398bbaa2deccfbb. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72402323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075ef962680d8b77a6239b2ed8e9bcf1cf357658ef72358e7b1e093705e2d58e. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72402318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606cbeaae6bbad1c5b69a55dfa1de88c4461afde2bab314c7c1aaf4c5c5f7a62. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72402322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ec5ec07368f6a66cb6594a794d9a792f38656b67115a8c1103bdbff693ab14. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72401501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f006e0bd49145f6cc1fbb7ccf7a0e34270ab1fc3eee18a57dc5ecd57febd472. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72401081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b440c008db70509f41c9dd6956cdba797172efd9f544230398bbaa2deccfbb. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72402323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf906632939cd6ba137205890c1bb6414fead18ae16c062130c6f70a87ce78ff. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72402324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2972161712763976b06848ff158646db6f43b940fc05a0dd22656819c5cd4a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXD782201705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc577fd5a6bad5c59e621c01ec63aeeb0dc97493b4316ea2e8624a26cdc050666. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM72007148.